LF33 - prekmit napajeni?

[Jan Waclawek]

Neviem, ktory LM1117 presne pozerate, ale v
http://www.ti.com/general/docs/lit/getliterature.tsp?genericPartNumber=lm1117-n&fileType=pdf
sa pise:

 The ESR of the output capacitor should range between 0.3 OHM - 22 OHM. 

Takze pozor na to, aj xx1117 je "jak ktery".

wek


----- Original Message ---------------

Subject: Re: LF33 - prekmit napajeni?
   From: Marek Sembol <hwm.land at gmail.com>
   Date: Fri, 21 Feb 2014 10:34:50 +0100
     To: HW-news <hw-list at list.hw.cz>

>No ja hned letel koukat do DS od LM1117, kterou mam pouzitou na nekolika
>mistech a tam ohledne vystupniho kondenzatoru pisou:
><citat>
>The output capacitor is critical in maintaining regulator stability,
>and must meet the required conditions for both minimum
>amount of capacitance and ESR (Equivalent Series Resistance).
>The minimum output capacitance required by the
>LM1117 is 10µF, if a tantalum capacitor is used. Any increase
>of the output capacitance will merely improve the loop stability
>and transient response. The ESR of the output capacitor
>should be less than 0.5ohm. In the case of the adjustable regulator,
>when the CADJ is used, a larger output capacitance
>(22µf tantalum) is required.
></citat>
>, takze je tam jen maximalni hodnota, ze by mela mensi hodnota ESR vadit
>nezminuji.
>
>Takze i s temi LDO je to asi "jak-ktery". Teda doufam, ze 1117 mohu pocitat
>mezi LDO...
>Marek
>